Next thing, you know, I agree that the amount of dialect in the libretto is slightly embarrassing in 2009, and it should be de-emphasized in performance. But I'm also reasonably sure that the libretto and score style one character's name this way:
Your press release says:
Are you also changing the title of one of his big numbers to "It Isn't Necessarily So"? Please don't. Ira will roll over in his grave.